Take Caterpillar , for example. This machinery company has had a huge run, up 240 percent from the generational lows of March 2009. It also recently had a nice breakout and, on Tuesday, posted a new 52-week high. For those who own CAT, Cramer said it's OK to take some profits, but not to sell the whole thing just yet.

Chart Week

Cramer teaches you how to find profits by going off the charts.

To illustrate why Caterpillar still has legs, Cramer looked to the charts. And he sought the help of Ken Shreve, a highly regarded technician on Wall Street, to explain their significance. Watch the video of his full analysis.